/*
 * File    : LoggerImpl.java
 * Created : 28-Dec-2003
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.gudy.azureus2.pluginsimpl.local.logging;

/**
 * @author parg
 *
 */

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;

import org.gudy.azureus2.core3.logging.ILogAlertListener;
import org.gudy.azureus2.core3.logging.LogAlert;
import org.gudy.azureus2.core3.logging.LogEvent;
import org.gudy.azureus2.core3.logging.impl.FileLogging;
import org.gudy.azureus2.core3.logging.impl.FileLoggingAdapter;
import org.gudy.azureus2.plugins.PluginInterface;
import org.gudy.azureus2.plugins.logging.FileLoggerAdapter;
import org.gudy.azureus2.plugins.logging.LogAlertListener;
import org.gudy.azureus2.plugins.logging.Logger;
import org.gudy.azureus2.plugins.logging.LoggerAlertListener;
import org.gudy.azureus2.plugins.logging.LoggerChannel;

public class LoggerImpl implements Logger {
    private PluginInterface pi;

    private List channels = new ArrayList();
    private Map alert_listeners_map = new HashMap();
    private Map alert_listeners_map2 = new HashMap();

    public LoggerImpl(PluginInterface _pi) {
        pi = _pi;
    }

    public PluginInterface getPluginInterface() {
        return (pi);
    }

    public LoggerChannel getChannel(String name) {
        LoggerChannel channel = new LoggerChannelImpl(this, name, false, false);

        channels.add(channel);

        return (channel);
    }

    public LoggerChannel getTimeStampedChannel(String name) {
        LoggerChannel channel = new LoggerChannelImpl(this, name, true, false);

        channels.add(channel);

        return (channel);
    }

    public LoggerChannel getNullChannel(String name) {
        LoggerChannel channel = new LoggerChannelImpl(this, name, true, true);

        channels.add(channel);

        return (channel);
    }

    public LoggerChannel[] getChannels() {
        LoggerChannel[] res = new LoggerChannel[channels.size()];

        channels.toArray(res);

        return (res);
    }

    public void addAlertListener(final LoggerAlertListener listener) {

        ILogAlertListener lg_listener = new ILogAlertListener() {
            public void alertRaised(LogAlert alert) {
                if (alert.err == null) {
                    int type;

                    if (alert.entryType == LogAlert.AT_INFORMATION) {
                        type = LoggerChannel.LT_INFORMATION;
                    } else if (alert.entryType == LogAlert.AT_WARNING) {
                        type = LoggerChannel.LT_WARNING;
                    } else {
                        type = LoggerChannel.LT_ERROR;
                    }

                    listener.alertLogged(type, alert.text, alert.repeatable);

                } else
                    listener.alertLogged(alert.text, alert.err, alert.repeatable);
            }

        };

        alert_listeners_map.put(listener, lg_listener);

        org.gudy.azureus2.core3.logging.Logger.addListener(lg_listener);
    }

    public void removeAlertListener(LoggerAlertListener listener) {
        ILogAlertListener lg_listener = (ILogAlertListener) alert_listeners_map.remove(listener);

        if (lg_listener != null) {

            org.gudy.azureus2.core3.logging.Logger.removeListener(lg_listener);
        }
    }

    public void addAlertListener(final LogAlertListener listener) {
        ILogAlertListener lg_listener = new ILogAlertListener() {
            private HashSet set = new HashSet();

            public void alertRaised(LogAlert alert) {
                if (!alert.repeatable) {
                    if (set.contains(alert.text)) {
                        return;
                    }
                    set.add(alert.text);
                }
                listener.alertRaised(alert);
            }
        };
        alert_listeners_map2.put(listener, lg_listener);
        org.gudy.azureus2.core3.logging.Logger.addListener(lg_listener);
    }

    public void removeAlertListener(LogAlertListener listener) {
        ILogAlertListener lg_listener = (ILogAlertListener) alert_listeners_map2.remove(listener);
        if (lg_listener != null) {
            org.gudy.azureus2.core3.logging.Logger.removeListener(lg_listener);
        }
    }

    public void addFileLoggingListener(final FileLoggerAdapter listener) {
        FileLogging fileLogging = org.gudy.azureus2.core3.logging.Logger.getFileLoggingInstance();
        if (fileLogging == null)
            return;

        fileLogging.addListener(new PluginFileLoggerAdapater(fileLogging, listener));
    }

    public void removeFileLoggingListener(FileLoggerAdapter listener) {
        FileLogging fileLogging = org.gudy.azureus2.core3.logging.Logger.getFileLoggingInstance();
        if (fileLogging == null)
            return;

        // find listener and remove
        Object[] listeners = fileLogging.getListeners().toArray();
        for (int i = 0; i < listeners.length; i++) {
            if (listeners[i] instanceof PluginFileLoggerAdapater) {
                PluginFileLoggerAdapater l = (PluginFileLoggerAdapater) listeners[i];
                if (l.listener == listener) {
                    fileLogging.removeListener(l);
                }
            }
        }
    }

    private class PluginFileLoggerAdapater extends FileLoggingAdapter {
        public FileLoggerAdapter listener;

        public PluginFileLoggerAdapater(FileLogging fileLogging, FileLoggerAdapter listener) {
            fileLogging.addListener(this);
            this.listener = listener;
        }

        public boolean logToFile(LogEvent event, StringBuffer lineOut) {
            return listener.logToFile(lineOut);
        }
    }
}
